Any process that increases the rate of growth of all or part of an organism.
Comment:
Note that this term and its definition depart from the usual conventions for GO 'regulation' process terms; regulation of rate is not usually distinguished from regulation of extent or frequency, but it makes sense to do so for growth regulation.
Synonyms:
exact_synonym:
up regulation of growth rate; upregulation of growth rate
narrow_synonym:
activation of growth rate; stimulation of growth rate